Type-writing machine.



J. 0. MOLAUGHLIN- TYPE WRITING MACHINE.

APPLICATION FILED OUT. 24, 1910 1 ,063,8 1 5, Patented June 3, 1913.

entree sTA'r s Parana enrich."

JOHN C. McLAUGI-ILIN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

' Specification of Letters Patent. Application filed October 24. 191i). Serial No. 588,592.

Patented Juncfl. 1913.

To (/7! ii /mm. it may concern:

Be it known that .l,.loi1N C. l\"[cln\uoi-1I.1N, a citizen ofthe United States, residing in Jersey City, in the countyof Hudson and t 4 l v p fwtaie of l\ew Jersey, have mvented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification.

The present invention relates to an improved means in a typewriting machine for shifting the platen with respect to the paper guide, to permit of correct and easy inser'- tion of considerable thicknesses of paper, or of paper with clasps and the like attached to it. In the preferred form of the present invention, the platen is shiftedindepend ently of its attached parts. such as the linespace wheels, etc. The shifting is preferably done by means of a crank mounted on the platen frame. The mechanism may be made'easy and light of operation, of few and simple parts, and quickly shiftable from one position to the other.

I also provide a simple and effective means for locking the platen to the shutter aide, so that the two may be normally turned together by the hand wheels or the linespacing mechanism, and also for unlocking the shaft and platen, to permit of the shifting of the latter relatively to the former and away from the paper guides. In the form of the invention hereinafter shown, the platen is supported on an eccentric fast to said platen shaft, and the platen is normally locked to the eccentric so as to turn with the shaft. The eccentric is, however, movable longitudinally on the platen shaft to be unlocked from the platen, whereupon,

when the shaft is turned, the eccentric is therefore turned and operates to shift the platen away from the paper guide.

The invention also comprises, in certain of its forms, a means for preventing accidental rotation ofthe platen during the shifting of the latter; and a simple device for effecting the longitudinal and turning movements of the eccentric.

The above and'other objects and features of the invention will more fully hereinafter appear.

In the accompanying drawlngs, Figure 1 is a rear view in perspective of the platen and plat-en shifting mechanism. Fig. is a view in end elevation of the mechanism shown in Fig. 1, when the same is in normal idle position. Fig. 3 is a view similar to Fig. 2 except that the operating lever has been moved sullicientl'v to lock the platen against rotation. Fig. i is a view showing the position of the parts when the operating lever is fully thrown. Fig. 5 is a top plan view of the platen and shifting mechanism, the platen being shown in cross section.

The invention is shown applied to an llnderwoml front strike machine.

The platen l is journaled at its ends on eccentrics 2 and 2 respectively, which are keyed to the platen shaft or axle -l so that the eccentrics turn with the shaft at all times; the platen shaft being journalcd in the platen frame (of which a part is indicated at 26) in the usual manner. During, line-spacing operations, the shaft, eccentrics and platen rotate as if nnnlc in one. piece.

The QCCtIlfl'lti 2 is. however. shiftable on its key 3, longitiulinally of the shaft. It carries a plate o having pins or bolts 7, which in the normal position of the eccentric lit within holes 8 in the head 9 of the platen roll, whereby the platen roll is normally locked to the eccentrieso that the roll and the eccentrics turn together when the shaft is rotated by hand wheels 5 or by the line spacing ratchet wheel 9. coiled eompressicn spring 10 which bears upon a hub or sleeve l1 fast to the eccentric 2, tends to force the disk fl toward the platen so that the pins or bolts 7 may engage the platen. Under nornlal conditions. therefore. the ecccntric 2 merelv serves to lock the platen to the platen shaft. ll'hen it is desired to shift the platen with respect [0 the paper guide 26 and feed rolls 2?. the platen is released from the control of the locking pins 7. For this purpose the eccentric 2 may be first moved longitudinally on the shaft 4, against the action of the spring 10. by suitablemenns; to withdraw the pins 7 from the platen, whereupon the eecdntric is free to rotate relatively to the platen, while still serving as a bearing therefor. The platen may be otherwise locked to and released from the eccentric. For shifting the eccen- IlC longitudinally to unlock the same from the platen, and for thereafter turning the eccentric to-shift the platen with "respect to the paper guide and feed rolls, there is provided a finger piece carried by one arm of a bell crank 11, fast to a rock shaft 13, which has bearing in the carriage frame 14. On the other arm of the bell crank lever 11 is a segmental rack 15 adapted-to mesh with a pinion 16 fast to the platen shaft 4. Fast to the rock shaft 13 is also an arm 17, on the end of which is a cam vmember 18. Fast to the hub 11 of the cocentric2 i s a disk 19. The disk 19 is so arranged with respect to the cam member 18 that, by engagement of the cam with the disk uponproper forward movement of the "lever 11, the eccentric is shifted axially of the platen far enough against tension of spring 10 to withdraw the pins from the platen.

Mounted on the carriage frame is a spring 20, carrying a detent2l, which, in the working positions of the parts shown in Figs. 3 and 4,. temporarily locks within a hole or seat 22 at the edge of the-platen, thereby preventing revolutlon of the platen. In the normal position of the lever 11, however, (see Fig. 2), a cam 23 carriedon arm 23 of the lever enga s e s rin and holds the detent 2i g p g 1 free of theplate'n so that the platen 1s free to be turned. 'Whenit is desired to 'Slllft the 'platen to insert the paper 24, the Iet'er 11 is rocked'up and back.

from the normal idle position shown in 'Fi'g. 2'. This is not done, however, until the platen has been turned to the fixed position indicated by some mark. 24 on thel platen, registering with a mark 24 on plate 20, so that the rec s- 22 is thereby brought opposite the detent 2 1, and the disk 19 is brought to proper position with respect to the cam 18. As soon as the'lever 11 has beenmoved up a slight distance, but before the segmental rack engages the pinion 16, the

' cam 23 is removed from the spring 20, permitti n g tl platen.

spring to throw the detent 21 into the rec css22, thereby locking the platen against rotation. Further upward movement of the lever 11 causes the cam 18 to engage the disk 19 on the eccentric 2, to move the latter to the left at Fig. 1, to

withdraw the pins or bolts 7 frcmthe" Further upward and backward movement of the lever 11 brings the segmental rack to the pinion 16, and causes the latter to be revolved. Since both the pinion 16 and the eccentrics are fast to the shaft 4, both eccentrics are turned with the shaft by the rack 15; andithe turning movement of the. eccentrics causes the platen 1 to beshifted up to the position shown in Fig. 4, away from the paper guide 26 and the paper-feeding rolls27 which usually run on the under side of the platen. The guide forms 'part of the usualplaten frame.

The platen, as above stated, is held against rotation during the shift of the same, by the detent 21. The spring 20, carrying the dc tent, is of such length and design as to move with the platen during the described shift of the latter without withdrawing the detentfrom the recess 22.

A stop 29 on the carriage frame limits the throw of-the' lever 11 "and connected parts. When the leverhas been thrown to the stop, the paper 24., with clasps 25 or the like, may be passed freely between the guide 26 and the platen. When the paper has been inserted, the platen is returned to non mal position by drawing forward the finger piece 10* with the lever 11, so that the pinion 16,- the segment 15,,and the cam 18 are returned to normal'positions. As soon as the return movement of the cam 18 permits, thespring 10 again throws the eccentrlc 2 amally to bring the pins 7 into engagement with'the platen to lock the latter to the eccentric. When the return movement of the lever 11 has brought the cam 23 to the spring 20, the cam acts upon the spring to force the detent from the recess 22, whereupon the platen is again' free to be rotated in the usual manner. The normal position of the lever 11 is determined by the engagement of the arm 23 with the carriage frame at 30.

It Will be seen that the platen may be readily lifted without affecting the usual bearings. of theplaten axle at 30*.1n the ends platen supported on the eccentric, means for locking the platen to the eccentric when M the latteris in one position onthe shaft so that the platen may be revolved with the shaft, and means for shifting the eccentric.

longitudinally on the shaft to unlock the eccentric and platen so that the eccentric may then be revolved relatively tothe platen to cause the platen to be shifted with respect tofiie paper guide.

2. In a typewriting machine, the combination of a paper guide, a platen shaft, an cecentric fixed to revolve with the shaft butshiftable longitudinally of the shaft. :1

lag

platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the, platen may he revolved with the shaft, and :1 -am for shifting the eccentric longitue lihally on the shaft to unlock the eccentric, and platen so that the eccentric may then he revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide.

In a typewriting machine, the combination of a paper guide, a platen shaft, an cecentric fixed to revolve with the shaft but shiftahle longitudinally of the shaft, a

" platen supported on the eccentric, a pin car ried by the eccentric engaging a hole in the end face of the platen for locking the platen to the eccentric when the latter is 1n one p0 sition on the shaft so that the platen may he .revolved with the shaft, and means for shifting the eccentric longitudinally on the shaft to withdraw the pin carried by the eccentric from the hole in the platen so that the eccentric may then be revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide.

41-. In a typcwriting machine, the combination of a paper guide, a platen shaft, an cc centric fixed to revolve with the shaft but shiftahle longitudinally of the shaft, a platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may he revolved with the shaft, means for shifting the eccentric longitudinally on the shaft to unlock the eccentric and platen so that the eccentric may then he I revolved relatively to the platen to cause the platen to be shifted .with respect to the paper guide, and a toothed pinion for turning the eccentric.

5. In a typewritingmachine, the combination of a paper guide, a platen shaft, an eccentric fixed to revolve with' the shaft hut shiftable longitudinally of the shaft, a platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may he revolved with the shaft, means for shifting the eccentric longitudh nally 'on the shaft to unlock the eccentric and platen so that the eccentric may then he revolved relatively to the platen to cause the. platen to be shifted with respect to the pa-.

per guide, a pinion fast to the shaft, a rack meshing with the pinion, and means for moving the rack to turn the eccentric.

'(i. In a typewriling machine, the conihination of a paper guide, a platen shaft, an eccentric fixed to revolve with the shaft hut shiftable longitudinally of the shaft, a

, platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on theshaft so that the platen may be revolved with the shaft,

centric fixed to revolve with the shaft but shiftable longitudinally of. the shaft, a platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, means for shiftin the eccentric longitudinally 'on. the sha t to unlock the eccentric and platen-so that the eccentric may then he revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide, and mcans'for holding the platen against revolution during the shifting of the eccentric. I

8. I n a typewriting machine, the combination of a paper guide, a platen shaft, an eccentric fixed to revolve with the shaft-hut shiftable loi'igitudinally of the shaft, a platen supported on the eccentric, means for locking the platen to the-eccentrihwlien the latter is in one position on the shaft so that the platen may be revolved with the shaft, means for shifting the eccentric longitudinally on the shaft to unlock the eccentric and platen so that the eccentric may then he revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide. and a spring actuated detent engaging the platen to hold the latter against revolution during the shifting of the eccentric. v

9. ln a typewriting machine, the combination of a paper guide, a platen shaft, an cecentric tixcd to revolve with the shaft but shiftahle longitudinally of the shaft, a platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may he revolved with the shaft,

means for shifting the eccentric longitudinally on the shaft to unlock the eccentnic and platen so that the eccentric may then he revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide, means for holding the platen against revolution during the shifting of the eccentric, and means for rendering said holding means no'rmally ineffective.

10. In a typewriting machine, the combination of a paper guide, a. platen shaft, an eccentric fixed to revolve with the shaft. hut shiftahle longitudinally of the shaft, a platen supported on the cccentrimmeans for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, means for shifting the eccentric longitudinally on the shaft to unlock the eccentric and platen so that the eccentric may then be re a volved relatively to the platen. to cause the shiftable longitudinally of the shaft, a;

platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, means for shifting the eccentric longitudinally on the shaft to unlock thecccentric and platen so that the eccentric may then be revolved relatively to the platen to cause the platen to be shifted with respect to the paper guide, a spring actuated detent engaging the platen to hold the latter against revolution during the shifting of the eccentric, .a cam engaging the detent device to render the latter normally ineffective, and means for moving the cam to release the detent .when the eccentric is to be turned relatively to the platen.

1:2. In a typewriting machine, the combinationof a platen frame, a paper guide, a platen shaft supported in the platen frame to rotate'with the platen, and means on the shaft for shifting the platen transversely of the shaft, to andfrom the paper guide.- -fl-SF-In a typewriting machine, the combination of a platen frame, apaper guide, a platen shaftsuppcrted in the laten frame torotate with the platen, an "an ecentricon the shaft for shifting the platen tr'ansversely guide. 7

14. In a typewriting machine, the combination of a platen frame, a paper guide, a platen having bearingscto permit it to be re.-

of the shaft, to and from the paper volved in the platen frame, and aneccentric normally rotatable with the platen but shiflfable relatively thereto for shifting the platen with respect to itsbearings, to move the platen to and from the paper guide.

15. In a typwriting machine, the combination of a platen frame, a paper guide, a platen having bearings to permit it to be revolved in said frame means for shifting the platen with respect; to its bearing, to move the platen to and from the pa er guide, and for sustaining-- the -pla'ten"-'wl%n shifted away from t-he" p.aper f 'uidgffia (1 means for normally preventing the 1 shift of the platen.

16. In a tygpewriting machine, the *eombi: nation of a laten'framaa paper guide,"a

platen having bearings permit it to be revolved in the frame, means for shifting the platen with respect toits hearings, to

move the platen, to and from thc'paper guide, and for sustaining the platen when shifted away from the paper guide, and

means for holding the platen against rota the shaft, and a lever for operating said holding means and for rotating the shaft to shift-the platen.

18. In a typcwriting machine, the combination of a platen frame a paper guide, a

-platen having bearingss'to permit it to be revolved in'the platen. ;'ffame, means nor mally disconnected froml rthe platen for shifting the platen with respect to its bearin s to move the laten to and fromthe a: z P

paper guide, and means for moving said shifting means into connection with the n platen. l

19. In a ty ewriting machine, the combination of a p aten frame, a paper guide, a

platen having bearings to 'permit it to be revolved in the platen frame, an eccentric for shifting the platen with respect to its hearings, to' move the platen to and from the paper guide, means for shifting said eccentric with respect to the platen, and.

means to render the eccentric effective and inefiectiveat will.

20. In a typewriting machine, the combination ofa paper guide, a platen shaft, an eccentric fixed to revolve with the shaft but shiftable I longitudinally of theshaft, a

platen supported on the cccentric,-means for locking the platen to the ecentric when the latter is ,in one position on the shaft'so that the platen maybe revolved with the. shaft, and a lever for shifting the eccentric lon itudinally on the shaft and releasing the locking means, and having means for thereafter rotating the eccentric to' cause the paper guide.

same to shift the platen with respect to the 21. In a typewriting machine, the combi-l nation of a paper guide, a platen shaft, an

-eccentric fixed to revolve with the shaft but shiftable longitudinally of the shaft, a

platen supported on theeccentri'c, means for locking the platen'to the eccentric when the latter is .in one position on the shaftsothat the platen may bereyfolved with the shaft, and a lever having-"a" cam forshifting the eccentric longttudina'llynn; the shaft and tel leasing thelockin' means, also' having means "for th ce ft'er' "matings the ascertain 3 eccentric fixed to revolve with the shaft hut shiftable longitudinally of the shaft, a platen supported on the eccentric, means for locking the platen to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, a lever for shifting the eccentric longitudinally on the shaft and releasing the locking means, and having means for thereafter rotating the eccentric to cause the same'to shift the platen with respect to the paper guide, and a disk or plate on the eccentric for engagement with the shifting cam.

23. In a typewriting machine, the combination of a paper guide, a platen shaft, an eccentric fixed to revolve with the shaft but shiftahle longitudinally of the shaft, a platen supported on the eccentric, means for lockingthe platen to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, a lever for shifting the eccentric longitudinally on the shaft and releasing the locking means, and having means for thereafter rotating the eccentric to cause the sameto shift the platen with respect to the paper guide, means for holding the platen against rotation during the shift of the same, and means operated from said lever for rendering said holding means normally ineffective.

2-4. in a typmvriting machine, the combination of a paper guide, a platen shaft, an eccentric fixed to revolve with the shaft but shiftable longitudinally of the shaft, a platen supported on the eccentric, means for locking the plalcn to the eccentric when the latter is in one position on the shaft so that the platen may be revolved with the shaft, a rocl; member having fast thereto an arm carrying a cam for engaging and shifting the ecc ntric and releasing the locking means. and having also fast thereto an arm carrying a segmental rack, a pinion fast to the platen shaft meshing with the rack, and means for rocking said rock member to shift the eccentric and thereafter to rotate the pinicn with the platen shaft and eccentric.

27. in a typewriling machine, the combination of a platen, a shaft extending through the platen to rotate therewith, and means for displacing the platen on said shaft.

it). In a lypewriting machine, the combination of a plalcn, a shaft to rotate therewith. a paper guide, means-for locking the platen against rotation, and means for revolving the shaft to shit the platen away from the papergnide.

27. in a lypewriting machine, the combination .of a platen, a shaft, means for locking the platen to the shaft, means for releasing said lock, means for locking the platen against rotation, and means for revolving the shaft to shift the platen transversely of the shaft.

28. The coml'iination with a revoluble platen, of a platen frame having journals upon which said platen rotates, said platen 'bcing normally concentric with said journals, and means between said journals and said platen for effecting bodily displacement of the platen to a position eccentric to said journals while connected thereto.

29. The combination of a platen frame, a shaft or axle journaled therein, a platen supported upon said shaft or axle to turn therewith, and means for displacing said platen to a position eccentric to said shaft or axle, and supporting it there.

30. The combination of a platen frame, a shaft journaled therein, a platen rotatable with said shaft and concentric thereto, means between said shaft and said platen for displacing the latter to an eccentric position, and means, including a finger-piece upon the frame, for operating said displacmg means.

Ill. The combination of a platen frame, a shaft journaled therein, a platen rotatable with said shaft and concentric thereto, means between said shaft and said platen for displacing the latter to an eccentric posil'ion, means, including a finger-piece upon the frame, for operating said displacing means, said platen normally locked to said shaft, and said operating means being provided with a device to release said platen from said shaft.

32. The combination of a platen fran'ie, a shaft journaled therein, a platen carried upon the shaft, releasable means for locking the platen to the shaft, and means rotatable relatively to the platen after such, release, for displacing the platen to a position *ccentric to the shaft.

33. The combination of a platen frame, a shaft journaled therein, a platen carried upon the shaft. releasable means for locking the platen to the shaft, means rotatable relatively to the platen after such release, for

displacing the platen to a position eccentric to the shaft, and means upon said frame for operating said displacing means, said operating means normally disengaged from said displacing means.

3 The combination of a platen frame, a platen, journal hearings in said frame \vhereon said platen revolves, means for displacing said platen bodily to a position eccentric to said journal bearings, and supporting it there, and means for holding the platen against accidental rotation while be ing displaced.

35. The combination of a revoluble shaft, a platen supported thereby to rotate therewith, and means between the shaft and the the shaft and the platen for displacing the.

platen to a position. eccentric to said shaft, and means for holding the platen against accidental rotation during such displacement.

37, The combination of a platen frame, a shaft journaled therein, eccentrlcs on said shaft, and a platen mounted on said ec-- centrics but concentric to said shaft to turn therewith; said eccentrics being rotatable to d splace the platen relatively to the shaft.

38. The combination of a platen frame, a shaft journaled therein, eccentrics on said shaft, a. platen mounted on said eccentrics but concentric to said shaft to turn therewith; said eccentrics being rotatable to displace the platen relatively to said shaft, and means upon said frame to .rotate said eccentrics.

39. The combination of a platen frame, a

shaft journaled therein, eccentrics on said shaft, and a platen mounted on said ec'cen tries but concentric to said shaft; said eccentrics being rotatable to displace the platen relatively to the shaft, and-means upon said frame to rotate said eccentrics, said rotating means normally disconnected from said eccentrics.

40. The combination with a platen, of a platenshaft, means to enable the shaft to displace the platen to a position eccentric of the shaft, and means for turning the shaft to displace the platen.

41. The combination with a platen, of a platen-shaft, means to.enable the shaft to displace the platen to a position eccentric of the shaft, and means for turning the shaft to displace the platen, said shaft-turning means including a finger-piece mounted upon a frame 'in which the shaft 1s our-' naled; .said finger-piece normally discon nected from the platen-shaft. p

' 42. The combination with a platen, /of a platen-shaft-, means to enable the shaft to displace the platen, to a position eccentric of the shaft, means for turning" the shaft to displace the platen, said shaft-tm-niitg means including a finger-piece mounted upon a frame in which the'shaft is journaled; said finger-piece normally disconnectedfrom the platen-shaft, means normally locking' the platen to the shaft, and means connected to said finger-piece for releasing the platen from the shaft.

43. The combination with a platen, of a platen-shaft, means to enable the shaft to displace the platen to a position eccentric of the shaft, means for turning, the shaft to displace the platen. said shaft-turning means including a finger-piece mounted upon a frame in which the shaftis jour thereto. r

'naled; said: finger-piece normally' disconnected from the platen-shaft, means nor-- mally locking the platen tothe sl'mft,'meansconnected to said finger-piece'feireleasing the platen from the shaft. and means for locking the platen against accidental mtation while being displaced.

44;. The combination with a'frame and a revoluble' laten journaled thereon, of a paper gui e to coiiperate with the platen, and means contained within the platen structure ,for displacing the platen bodily relatively to its journals while connected 45. The combination with av frame and a 'revoluble platen journaled' thereon, of a paper guide to coiiperate-with the platen, and means contained within the platen structure for displacing the platen bodily relatively to its journals; saidplaten provided with an indicating device .to show when the parts are in operative positionsfor displacing the platen.

46. The combination with a frame and a revoluble platen journaled thereon, of a paper guide to coiiperate with the platen, means contained within the platen structure for displacing the platen'bodily relatively to its journals; said platen-provided with an indicating" device to show when the parts are inoperative positions for displacing.

the platen, and means to hold the platen against accidental rotation while being displaced.

47. In a typewriting machine, the combination of a paper'guide, a platen cylinder, an eccentric on whichthe platen is mounted, means whereby the eccentric is normally locked to the platen to rotate as a unit therewith, and a leyer and means controlled there by for' unlodking the eccentric from i the platen and for rotating the eccentric relatively to the platen to cause'the latter to be shifted with respect to the paper guide.

48. In a typewriting machine, the combination of a paper guide, a platen cylinder, an eccentric. o'n/which the platen is mounted, a platen shaft to which the eccentric is fast, means whereby the eccentric is normally locked to the platen to rotate as a unit therewith, and a lever and means controlled thereby for unlocking the eccentric from the,

49. In a typewriting machine, the combi-- nation. of a platen shaft. an eccentric fastv to the platen shaft, a platen cylinder engraced by the ehcentric, a pinion fast to the platen shaft. and means for rotating the pinion to turn the shaft and eccentric relati\'el V to the platen, whereby the platen isshifted transversely of the platen shaft.

50. In a typewriting machine, the combias a unit therewith, a cam for releasing the .rack on the platen frame for rotating the said shaft, aplaten cylinder engaged by rotate as a unit therewith, and means for tached to the iaicentric, a bolt adapted to rotating the eccentric when the bolt is with for so shifting the platen.

nation of a platen frame, a platenshaft, an eccentric fast to said platen shaft,-a platen cylinder engaged by the eccentric, a pinion fast tothe platen shaft, and a segmental pinion to turn the shaft and eccentric relatively to the platen, whereby the platen is shifted transversely of the platen' shaft. i

51. In a typewriting machine, the combination of a platen shaft, an eccentric fast to said shaft,a platen cylinder engaged by the eccentric, means whereby the eccentric is nori'na lly locked to the platen to rotate as a unit therewith, a cam for releasing the eccentric from the platen to permit of rotation of the eccentric relatively to the platen, and means for operating said cam.

52. In a typewriting machine, the combination of a platen shaft, an eccentric fast to the eccentric, a device whereby the eccentrio is normally connected to the platen to releasing the eccentric from the platen to permit of rotation of the eccentric relatively to the platen.

In a typewriting machine, the combination of a platen shaft, an eccentric fast. to said shaft, a platen cylinder engaged by the eccentric, means whereby the eccentric.

1S normally locked to the platen to rotate eccentric from the platen to permit of rotation of the eccentric relatively to the platen, and means for operating said cam and for rotating the eccentric relatively to the platen to cause the latter to be shifted transversely of the shaft.

54:. In a typewriting machine, the combination of an eccentric, a platen cylinder mounted on said eccentric, an element at lock the platen and the eccentric against relative rotation, means for withdrawing the bolt to permit of rotationof the eccentric relatively to the platen, and means for drawn.

55. In a t-ypewriting machine, the combi' nation of a paper guide, a platen frame, a platen shaft supported in the platen frame, a platen, means which connects'the platen to the shaft to cause the two to rotate together under normal conditions, but which is adjustable to permit the shifting of the platen transversely of the shaft with respect to the paper guide, and means on the platen shaft 56. In a t-ypewriting machine, the combination of a paper guide, a platen frame, a platen shaft supported in the platen frame, a platen, means which connects the platen to the shaft. to cause, the two to rotate together undo.- normal conditions, but which I is adjustable to permit the shifting of the platen. transversely of the shaft with respect to the paper guide, and an eccentric for shifting the platen.

57. In a typewri nation of a paper guide, a platen frame. a platen shaft supported in the platen frame, a platen, means for supporting the platen on the platen shaft, and means including an element of said supporting means operable by a pinion on'thc platen shaft for shifting the platen transversely of the shaft with respect to the paper guide.

In a t-ypewriting machine, the combination of a paper guide, a platen frame, a platen shaft supported in the platen frame, and means for holding the platen to cause the same to turn with the shaft under normal conditions, and for shifting the platen transversely of the shaft with respect to the paper guide.

59. In a typewriting machine, thecomblnation with a platen, of a shaft extending through the platen and capable of rotating the platen, means for shifting said platen on and relatively to said shaft and means ting machine, the coinbi-.

for holding the platen'against rotation durmg the operation of the platen shifting IllGtllls.

(30. In a typewriting machine, the combination of a platen frame, a paper guide, a platen, said platen frame having journals to permit the platen to be revolved, means connected to both ends of the platen for ositively' shifting it with respect to said ]O11I- nals away from the paper guide sufliciently to make an opening or clearance for the in- -positively shifting it transversely of the shaftand away from the paper guide sufficiently to make an opening or clearance for the insertion of paper around the platen without obstruction from the guide and means for holding the platen against rotation duriug the operation of the platen shift, ing means.

(32. In a typewritiug machine, the combination of a. paper guide, a platen frame, ,a platen shaft supported in the platen frame, a platen. and means for supporting the platen on the platen shaft and'for shifting the platen transversely of the, platen shaft; the shifting means being normally rotatable as a unit with the platen.

(33. In a typewriting machine the combination of. a paper guide, a platen frame, a ing the platen against rotation. While rotatplatcn. shaft supported in the platen frame, ing the shifting means.

a platen means for supportinp' the platen on the platen shaft and for shifting the JOHN G I- platen transversely of the platen shaft, the Vitnesses:

shifting means being normally rotatable as K. FRANKFOR'If, w a umt wlth the platen, and means for h0ld- C. RIPLEY.

Copies of this patent 'may be obtained for five cents each, by addressing the Commissioner o't Patents,

Washington, D. C. 

